A thalamic circuit facilitates stress susceptibility via melanocortin 4 receptor‐mediated activation of nucleus accumbens shell
| Autor: | Qiao Deng, Shao‐Qi Zhang, Ping‐Fen Yang, Wan‐Ting Dong, Jia‐Lin Wang, Jian‐Guo Chen, Fang Wang, Li‐Hong Long |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | CNS Neuroscience & Therapeutics. 29:646-658 |
| ISSN: | 1755-5949 1755-5930 |
| DOI: | 10.1111/cns.14046 |
| Popis: | Central melanocortin 4 receptor (MC4R) has been reported to induce anhedonia via eliciting dysfunction of excitatory synapses. It is evident that metabolic signals are closely related to chronic stress-induced depression. Here, we investigated that a neural circuit is involved in melanocortin signaling contributing to susceptibility to stress.Chronic social defeat stress (CSDS) was used to develop depressive-like behavior. Electrophysiologic and chemogenetic approaches were performed to evaluate the role of paraventricular thalamus (PVT) glutamatergic to nucleus accumbens shell (NAcsh) circuit in stress susceptibility. Pharmacological and genetic manipulations were applied to investigate the molecular mechanisms of melanocortin signaling in the circuit.CSDS increases the excitatory neurotransmission in NAcsh through MC4R signaling. The enhanced excitatory synaptic input in NAcsh is projected from PVT glutamatergic neurons. Moreover, chemogenetic manipulation of PVTOur results make a strong case for harnessing a thalamic circuit to reorganize excitatory synaptic transmission in relieving stress susceptibility and provide insights gained on metabolic underpinnings of protection against stress-induced depressive-like behavior. |
| Databáze: | OpenAIRE |
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